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9afc5eee65
Christoph Hellwig suggested a slightly different path for handling backwards compatibility with the 32-bit time_t based system calls: Rather than simply reusing the compat_sys_* entry points on 32-bit architectures unchanged, we get rid of those entry points and the compat_time types by renaming them to something that makes more sense on 32-bit architectures (which don't have a compat mode otherwise), and then share the entry points under the new name with the 64-bit architectures that use them for implementing the compatibility. The following types and interfaces are renamed here, and moved from linux/compat_time.h to linux/time32.h: old new --- --- compat_time_t old_time32_t struct compat_timeval struct old_timeval32 struct compat_timespec struct old_timespec32 struct compat_itimerspec struct old_itimerspec32 ns_to_compat_timeval() ns_to_old_timeval32() get_compat_itimerspec64() get_old_itimerspec32() put_compat_itimerspec64() put_old_itimerspec32() compat_get_timespec64() get_old_timespec32() compat_put_timespec64() put_old_timespec32() As we already have aliases in place, this patch addresses only the instances that are relevant to the system call interface in particular, not those that occur in device drivers and other modules. Those will get handled separately, while providing the 64-bit version of the respective interfaces. I'm not renaming the timex, rusage and itimerval structures, as we are still debating what the new interface will look like, and whether we will need a replacement at all. This also doesn't change the names of the syscall entry points, which can be done more easily when we actually switch over the 32-bit architectures to use them, at that point we need to change COMPAT_SYSCALL_DEFINEx to SYSCALL_DEFINEx with a new name, e.g. with a _time32 suffix. Suggested-by: Christoph Hellwig <hch@infradead.org> Link: https://lore.kernel.org/lkml/20180705222110.GA5698@infradead.org/ Signed-off-by: Arnd Bergmann <arnd@arndb.de>
57 lines
1.2 KiB
C
57 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_ELFCORE_COMPAT_H
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#define _LINUX_ELFCORE_COMPAT_H
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#include <linux/elf.h>
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#include <linux/elfcore.h>
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#include <linux/compat.h>
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/*
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* Make sure these layouts match the linux/elfcore.h native definitions.
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*/
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struct compat_elf_siginfo
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{
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compat_int_t si_signo;
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compat_int_t si_code;
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compat_int_t si_errno;
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};
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struct compat_elf_prstatus
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{
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struct compat_elf_siginfo pr_info;
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short pr_cursig;
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compat_ulong_t pr_sigpend;
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compat_ulong_t pr_sighold;
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compat_pid_t pr_pid;
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compat_pid_t pr_ppid;
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compat_pid_t pr_pgrp;
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compat_pid_t pr_sid;
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struct old_timeval32 pr_utime;
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struct old_timeval32 pr_stime;
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struct old_timeval32 pr_cutime;
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struct old_timeval32 pr_cstime;
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compat_elf_gregset_t pr_reg;
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#ifdef CONFIG_BINFMT_ELF_FDPIC
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compat_ulong_t pr_exec_fdpic_loadmap;
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compat_ulong_t pr_interp_fdpic_loadmap;
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#endif
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compat_int_t pr_fpvalid;
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};
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struct compat_elf_prpsinfo
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{
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char pr_state;
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char pr_sname;
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char pr_zomb;
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char pr_nice;
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compat_ulong_t pr_flag;
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__compat_uid_t pr_uid;
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__compat_gid_t pr_gid;
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compat_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
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char pr_fname[16];
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char pr_psargs[ELF_PRARGSZ];
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};
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#endif /* _LINUX_ELFCORE_COMPAT_H */
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